Hydroxy Polyimide 막의 제조와 이산화탄소 투과 특성

Prepration of Hydoxy Polyimde Membranes and Their Carbon Dioxide Permeation Property

  • 우승문 (경상대학교 나노신소재공학부 공학연구원 아이큐브사업단) ;
  • 최종진 (경상대학교 나노신소재공학부 공학연구원 아이큐브사업단) ;
  • 남상용 (경상대학교 나노신소재공학부 공학연구원 아이큐브사업단)
  • Woo, Seung-Moon (School of Materials Science and Engineering, Engineering Research Institute, I-Cube Center, Gyeongsang National University) ;
  • Choi, Jong-Jin (School of Materials Science and Engineering, Engineering Research Institute, I-Cube Center, Gyeongsang National University) ;
  • Nam, Sang-Yong (School of Materials Science and Engineering, Engineering Research Institute, I-Cube Center, Gyeongsang National University)
  • 투고 : 2012.04.24
  • 심사 : 2012.04.26
  • 발행 : 2012.04.30

초록

본 연구에서는 hydroxy polyimide (HPI)로 용매 증발법에 의해 제조가 되었다. 비다공성막의 기체투과성능측정 결과로써, $CO_2$ 투과도는 약 85 Barrer이고, $CO_2/N_2$선택도는 23으로 측정되었다. 고분자, 용매, 비용매-첨가제의 3성분계 시스템을 도입하여 평막과 중공사막을 제조하였고, 모폴로지와 기체투과성능을 전계방출형전자주사현미경과 버블플로우메타로 측정하였다. 평막과 중공사막에서 $CO_2$투과도와 $CO_2/N_2$ 선택도는 각각 18.28 GPU, 70 GPU를 6.72, 8.63으로 나타남을 확인하였다. 중공사막이 평막보다 기체투과특성이 우수하다는 것을 확인하였다.

In this study, hydroxy polyimide (HPI) was prepared for non-porous membrane by solvent evaporation method. As the result of gas permeance properties measurement, $CO_2$ permeability was 85 Barrer and the $CO_2/N_2$ selectivity was 23 at $30^{\circ}C$. Flat sheet membrane and hollow fiber membrane were prepared by using ternary system of polymer, solvent and non-solvent additive. Morphologies and gas permeance properties were measured by FE-SEM and bubble flow meter. Each $CO_2$ permeability of 18.28 GPU, 70 GPU and $CO_2/N_2$ selectivity of 6.72, 8.63 at $30^{\circ}C$ in the flat sheet membrane and hollow fiber membrane. Hollow fiber membrane has gas permeance property better than flat sheet membrane.

키워드

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